France is facing questions over its monitoring of extremists after both of the attackers who slit the throat of an elderly priest were known to authorities - including a teen who twice tried to wage jihad in Syria, NBC News reported.
Adel Kermiche, 19, was intercepted and arrested as he traveled to fight alongside ISIS using family members' identity documents two times last year.
He was put under house arrest in his hometown of Saint-Etienne-du-Rouvray near Rouen, Normandy, with an electronic surveillance ankle bracelet after a judge freed him, terror prosecutor Francois Molins said.
U.S. & World
Kermiche was one of 1,100 French citizens or residents who want to travel to the Middle East to fight alongside ISIS or who have already been and come back, according to government estimates.